Pipe-expanding tool.



1110.841388. PATENTED JAlma, 190v.

- J..GAPP.

PIPE EXPANDING OOL. v APPLICATION FILED JAN. 23. 1906.

2 SHEETS-SHEET 1.

WIYWES:

is a specification.

likfejandis particularly designed for use in UNITED STATES PATENT OFFICE.

JOHN GAPP, OF SCRANTON, PENNSYLVANIA. f PIPE-EXPANDING TooL.

Patented J an. 1 5. 1 907.

To all whom it may concern: U

Be it known that 1, JOHN GAPP, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented a new and useful Pipe Expanding Tool, of which the following Theobject of the present invention is .to providean improved tool for expanding and beadinglor forming annular seats upon hard metallic tubes of copper, iron, steel and the "lco'n'nection with apneumatichammer.

The tool includes a clamp member for hold'- mg the p pe to be upset'and a plunger member to be carried by a pneumatic hammer for contact with a pipe to bend or upset the latter around thecoreportion of the clamp. It is proposed to have the plunger member resition for upsetting a pipe.

versible, one .end being formed for starting the upsetting ofthe pipe and the other end arranged to complete the bead or flange;

With these and other objects in view the present invention consists in the combination and arrangement of parts, aswill be here-.

inafter more fully described, shown in the accompanying drawings, and particularly pointed out in the appended claims.

In the drawings, Figure 1 is a side elevation of a toolof the present invention in po- Fig. 2 is an enlarged deta1l sectional view in the final stage of operation of the tool. Fig. 3 is a detail pers ective view of the work-holder. Fig. 4 is a etail perspective view of the stem for the port of the plunger. imilar numerals of reference designate corresponding parts in all of the figures of the 'drawin s.

pliate mem For t e support of the work, which is a pipe 1, there is provided an appropriate clamp to embracethe ipe, said clamp including dufiers 2, which are preferably rectangular and hinged, as at 3. The meeting faces of the clamp members are provided with semicylindrical grooves 4, which register when the clamp members are closed and form a work-receiving seat or passage. The

I forward end of each clamp member is provided with a semicylindric'al flange 5, the two flanges coiipe'rating to form a tube constituting a continuation of the bore or pas sage of the clamp member. Each clamp member is provided at its forward end with a shoulder 6 flush with its front end and extending across that face of the member which is opposite the groove 4. 4 The other two faces ofv each clamp member are provided with transverse shoulders 7, which are wider than the shoulders 6, the hinge 3 being located upon the adjacent shoulders 7 of the two clamp members.

Preparatory to upsetting the end of the pipe said pipe is received Within the clamp or work -'holder, and then the latter is held in a vise, (not shown,) the edges of the vise engaging back of one or the other of the sets of shoulders 6 and 7, so as to prevent endwise displacement of the work-holder through the vise. When assembling the work and the work-holder, care should be taken to have that end of the pipe which is to be u set project a suitable distance in front of til bers 5, which constitute the core around which the end of the pipe-is to be u set. By preference the meeting edges of t e clamp members have dowel-pins 8 to engage sockets 9 in the respective oppositeedges of the holder. J

H The plunger consists of a solid body 10,

which is tapered or substantially conical in opposite directions from its middle and is pierced by a central longitudinal cylindrical bore or passage 11 open at opposite ends.

One end portion of the body is provided with a stepped series of concaved conical portions progressing in diameter'from the end of the body to the middle thereof, two such ortions being shown at 12 and 13'. It wil of course be understood that a greater number of-conical portions may be employed, if desired. The other end of the body is provided with a stepped series of annular shoul ders.14 and 1,5, progressing in diameter inwardly from the adjacent end of the body, the radial faces of the shoulders being concaved.

Removably associated with the plunger is .a cylindrical stem 16, which is of a size to have a Working fit within the bore 11 of the body and provided substantially midway of its ends with an annular enlargement 17 constituting a shoulder or abutment.

In practice, the work having been placed in the workholder and the latter secured in a vise, as hereinbefore described, the body of the plunger and the stem are assembled with the concaved shouldered end against the shoulder 17, the other end portion of the stem being received within a chuck of any approved or conventional form of neumatic hammer 18. The hammer and t is plunger are then moved up to the work, so as to project one of the conical portions 12 or 13 within the outer end of the pipe. The hammer is then set in operation and the plunger driven against the projecting end of the pipe, so as to upset or bend outwardly that portion of the pipe which projects in front of the core portion of the work-holder. The hammer isthen withdrawn from the work, the plunger-head reversed upon the stem 16, and then returned to the work, with the terminal upset end of the pipe within. one or the other of the concaved shoulders 14 and 15 of the I plunger, whereupon the hammer is again set in operation and the pipe completely upset around. the forward edge of the core 5, so as to give the desired shape to the bead or flange 19, which is thus formedupon the ipe. v p It will now be understood that the plungenhead and the stem are separable in order that the head may be reversed upon the stem to complete the upsetting of the pipe, which was started by the other, end of the head, whereby one tool starts and also completes the upsetting operation. When. the purpose of the bead or flange 19 is to hold a collar upon the pipe, such collar, as shown at 20, is placed upon the pipe and slid back of the work-holder. After the flange 'or bead has been formed and the pipe removed from the work-holder the collar is slid forwardly until stopped by the bead or flange 19, wherefore the collar will be held in place for use in coupling the pipe to another pipe, for ir: stance, as shown. in my Patent N 0. 769,896, issued September 13, 1904.

I Havin thus described the invention, what is claimer is- 1. A tool of the class described including a stem having one end formed for engagement with a pneumatic hammer and provided intermediate of its ends with. a shoulder, a plun ger-he'ad reversible upon the other end portion of the stem with its opposite ends provided with working faces of different characters for successive engagement with the work, the shoulder on the stem constituting an abutment for engagement with the head to drive the latter under the action of the ham mer. I

2. A pipe-expanding tool including a stem having a shoulder intermediate of its ends,

one end of said stem forming a. reciprocatory psettmgplu'ngerdrive member, and a tube. Y head reversibly carried lfi-iifilltlligliChOf the stem for engagementv with theshouldcr, the opposite ends of the plunger-head having working faces of different character for successive engagement with the work.

3. A pipe-expanding tool of the class de scribed, comprising a drive-stem arranged to receive reciprocatory movement, and a reversible plunger-head carried thereby and provided at its opposite ends with working faces for upsetting the ends working face of one end of the head dificring from that of the other end of the head.

4. A tool of the class described comprising a stem, and a reversible head having an 0 ening receiving the stem, one end of the dead having a working face, and the other end of the head having a working face of different character.

5. A tool of the class described having a.

reversible plunger-head, one end of the head, having a tapered working face, and the other end of the head having an annular shoulder with its radial working face provided with an annular groove'I 6. A tool of the class described comprising a reversible head having one end portion provided with a stepped series tions, and the other end of the provided with a stepped series of annular shoulders having their radial working faces provided with annular grooves.

7. A tool of the class described comprising in combination a plunger-head having a work-face, and a work-holder provided at its forward end with a tubular core around which the work is to be 11 set, and provided in rear of the core with a s ioulder for engagement with a vise.

8. A tool of the class described comprising in combination an upsetting-plunger, and a work-holder including hinged members hav-' ing corresponding semicylindrical' grooves constituting a work-receiving seat, the front ends of the members having semicylindrical flanges constituting a core around which the work is to be upset, and the. members being provided in rear of the for engagement by a vise.

9. A tool of the class described comprising a stem, and a tubular expanding plungerhead reversibly embracing'the stem,one end of'th'e head having a working face, andtthe other end of the head having a working face differing from the first-mentioned face.

of a tube, the

of conical .porhead beingcore with shoulders In testimony that I claim the foregoing as my own I have hereto affixed my signature in'the presence of two witnesses. g JOHN GAPP. -Q vVitnesse s FRED W. NIcHoLsoN,

FREDERICK C. EHRHARDT. 

